Operators in Python

In todays session we will see some of the most important data types in Python and some Examples...

In previous examples we have seen how to use print ,If we are using python3 then print is a function, syntax is as follows.

print (arguments)

Let us see how to print in different ways.

Now let us see how to scan an input from user

ie to scan in string format:

variable=raw_input(arguments)

in python 3 raw_input is not available 

to scan in integer format type cast it in python:

variable=int(raw_input(arguments))  or  variable=input(arguments)

  

to print data type use print type(variable)

in python3 input function will read like string if not used the typecasting.

 

• ASSIGNMENT 

*** Write a program to swap two elements
Ans:
       

If we dont know a perticular function duty use help(function)

                                         help(int),help(str)......

 OPERATORS

 ARITHMATIC OPERATORS

+   (Addition)

 -   (Subtraction) 

*    (Multiplication)

/    (Division)

**   (Power of)

//    (Floor Division) -for removing decimal part after division

  

 RELATIONAL OPERATORS

 <   (Less than)

 >  (Greater than) 

=    (Assignment)

!=    (Not Equal to)

==   (Comparison)

<=    (Less than or equal to)

>=    (greater than or equal to)

LOGICAL OPERATORS

and - logical anding

or -  logical oring

 not - logical Noting

BITWISE OPERATORS

 &  (And)

 |  (Or) 

~    (Complement)

<<    (Left shift)

>>   (Right shift)

Python is very efficient in memory saving.every thing is treated as seperate object but we get same address for x and z also for y and k since their value is same.Every memory is allocated dynamically.

to find size of an object use : variable.__sizeof__()

MEMBERSHIP OPERATORS

 in , not in

In a list ie:-

l=[10,20,30,40]

10 in l will give true,10 not in l will give False

 

IDENTITY OPERATORS

 is ,is not

x=10

y=20

x is not y => True

x is y=> False

 In the next sections we will see more about Data Types in Python...
THANK YOU..